Senior Software Engineer

Our Purpose
Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.
Title and Summary
Senior Software Engineer
Who is Mastercard?
Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible. Using secure data and networks, partnerships and passion, our innovations and solutions help individuals, financial all.
Role
Responsible for the analysis, design, development, and delivery of software solutions, with a strong emphasis on building intuitive, responsive, and accessible user interfaces.
Defines requirements for new applications and customizations, adhering to standards, processes, and best practices.
Responsibilities
-Participate in team prioritization discussions with Product/Business stakeholders.
-Estimate and own delivery tasks (design, dev, test, deployment, configuration, documentation) to meet the business requirements.
-Design and develop scalable, reusable UI components using modern frameworks (e.g., React, Angular, Vue).
-Collaborate with UX designers to translate wireframes and mockups into responsive, accessible web interfaces.
-Ensure cross-browser compatibility and optimize UI performance.
-Automate build, operate, and run aspects of software.
-Drive code/design/process trade-off discussions within their team when required.
-Report status and manage risks within their primary application/service.
-Drive integration of services focusing on customer journey and experience.
-Perform demos/acceptance discussions in interacting with Product owners.
-Understand operational and engineering experience, actively work to improve experience and metrics in ownership area.
-Develop complete understanding of end-to-end technical architecture and dependency systems.
-Drive adoption of technology standards and opinionated frameworks, and review coding, test, and automation work of team members.
-Mentor and guide new and less-experienced team members.
-Identify opportunities to improve an overall process and trim waste.
-Share and seek knowledge within Guild/Program to drive reuse of patterns/libraries/practices and enhance productivity.
About You
-Proficient in writing secure code in three or more languages (e.g., JavaScript, TypeScript, SQL).
-Strong experience with modern UI frameworks (e.g., React, Angular) and state management libraries (e.g., Redux, Context API).
-Familiar with secure coding standards (e.g., OWASP, CWE, SEI CERT) and vulnerability management.
-Able to perform debugging and troubleshooting using browser dev tools and performance profiling.
-Understands and implements standard branching (e.g., Gitflow) and peer review practices.
-Skilled in test-driven and behavior-driven development (TDD and BDD) for UI components.
-Experience with accessibility standards (WCAG) and building inclusive user experiences.
-Understands and implements responsive design principles and mobile-first development.
-Familiar with API integration and asynchronous data handling (e.g., REST, GraphQL, Axios, Fetch).
-Applies tools (e.g., Blackduck, Sonar, Checkmarx) to measure UI performance and code quality.
-Collaborates with team and business stakeholders to estimate requirements and prioritize based on business value.
-Orchestrates release workflows and pipelines using CI/CD tools (e.g., Jenkins, GitHub Actions, Azure DevOps).
-Understands how to build robust UI tests using tools like Jest, Cypress, Playwright.
-Conducts product demos and coordinates with product owners to drive product acceptance signoffs.
-Collaborate with backend teams to design APIs that support efficient data fetching and pagination.
Corporate Security Responsibility
All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

• Abide by Mastercard's security policies and practices;
• Ensure the confidentiality and integrity of the information being accessed;
• Report any suspected information security violation or breach, and
• Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines.